We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 250 mA, 250 V AC, 125 V DC - Time-Delay Cylindrical Fuses
BUSSMANNTime-Delay Cylindrical Fuses

BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 250 mA, 250 V AC, 125 V DC

The BUSSMANN FRN-R-1/4 is a Class RK5, time-delay cylindrical fuse from the FRN-R Series, rated at 250 mA with 250 V AC and 125 V DC capacity. It is non-indicating, designed for overcurrent protection in industrial…

SKU 3G-OTH-26108

Also listed as: FRNR14 · FRN R 1 4 · FRN-R-1-4

Brand
BUSSMANN
Item
Fuse: Class RK5, FRN-R Series, Time-Delay, 250 mA, 250 V AC, 125 V DC
Category
Time-Delay Cylindrical Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BUSSMANN
Manufacturer Part Number
FRN-R-1/4
Series
FRN-R
Type
FRN-R Series, Time-Delay, 250 mA, Non-Indicating
AC
250 V
DC
125 V

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BUSSMANN FRN-R-1/4 is a Class RK5, time-delay cylindrical fuse from the FRN-R Series, rated at 250 mA with 250 V AC and 125 V DC capacity. It is non-indicating, designed for overcurrent protection in industrial circuits requiring a time-delay characteristic.

Frequently Asked Questions

What is the BUSSMANN FRN-R-1/4 fuse used for?

The BUSSMANN FRN-R-1/4 is a Class RK5 time-delay cylindrical fuse rated 250 mA, 250 V AC, and 125 V DC. It protects motor circuits, transformers, and other inductive loads from overcurrent while tolerating harmless inrush currents. Common in industrial control panels and HVAC equipment.

What are the specifications of the BUSSMANN FRN-R-1/4 fuse?

The BUSSMANN FRN-R-1/4 is a Class RK5, FRN-R Series, time-delay, non-indicating fuse. It is rated 250 mA, 250 V AC, and 125 V DC. The manufacturer part number is FRN-R-1/4. It provides branch-circuit protection for motor and transformer applications.

Where to buy the BUSSMANN FRN-R-1/4 fuse worldwide?

3G Electric supplies the BUSSMANN FRN-R-1/4 fuse worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source genuine BUSSMANN components for industrial maintenance and OEM needs.

How to select the correct BUSSMANN FRN-R series fuse for a motor circuit?

Select a BUSSMANN FRN-R series fuse based on motor full-load current and starting characteristics. The time-delay feature allows temporary inrush without nuisance opening. For a 250 mA motor, the FRN-R-1/4 is appropriate. Always verify voltage rating (250 V AC) and interrupting rating per NEC guidelines.

Used in

Common applications for BUSSMANN
Industrial motor control centers — BUSSMANN LPT series Class T time-delay fuses for branch circuit protection
Semiconductor protection in variable frequency drives — BUSSMANN FWA series fast-acting bolt-on fuses rated 150 V AC/DC
Automotive auxiliary circuit protection — BUSSMANN CB222 series Type II circuit breakers in 12 V DC systems
Control panel overcurrent protection — BUSSMANN FNA series midget time-delay indicating fuses for instrumentation
Main feeder protection in power distribution — BUSSMANN KLU series Class L time-delay bolt-on fuses up to 650 A
Fuse replacement in existing panels — BUSSMANN S-8301-1-R fuse block accepting 3AG and other glass/ceramic fuses

BUSSMANN Products

3G Electric supplies BUSSMANN time-delay cylindrical fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 125 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-1/8)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 125 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-1/8)
Class RK5 time-delay cylindrical fuse rated 7.5 A at 250 V AC and 125 V DC. Non-indicating design with time-delay characteristic for motor and transformer protection. Suitable for branch-circuit protection in industrial and commercial power distribution systems
BUSSMANN
Class RK5 time-delay cylindrical fuse rated 7.5 A at 250 V AC and 125 V DC. Non-indicating design with time-delay characteristic for motor and transformer protection. Suitable for branch-circuit protection in industrial and commercial power distribution systems
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 4.5 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-4-1/2)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 4.5 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-4-1/2)
Class RK5 time-delay cylindrical fuse rated 3.5 A, 250 V AC and 125 V DC. Non-indicating type from the FRN-R Series. Provides overcurrent protection for motor and transformer circuits, lighting, and branch circuits where inrush currents are present
BUSSMANN
Class RK5 time-delay cylindrical fuse rated 3.5 A, 250 V AC and 125 V DC. Non-indicating type from the FRN-R Series. Provides overcurrent protection for motor and transformer circuits, lighting, and branch circuits where inrush currents are present
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 100 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-1/10)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 100 mA, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-1/10)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 35 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-35)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 35 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-35)

More from BUSSMANN

View all BUSSMANN parts →
Time-delay cylindrical fuse rated 25 A at 250 V AC. Midget size (13/32 x 1-1/2 in) with non-indicating design. Suitable for overcurrent protection in control circuits, motor starters, and lighting systems where temporary inrush currents occur
BUSSMANN
Time-delay cylindrical fuse rated 25 A at 250 V AC. Midget size (13/32 x 1-1/2 in) with non-indicating design. Suitable for overcurrent protection in control circuits, motor starters, and lighting systems where temporary inrush currents occur
Time-delay cylindrical fuse rated 500 mA at 250 V AC, non-indicating, with dimensions 1/4 in x 1 1/4 in. Suitable for protecting circuits with inrush currents in control panels, power supplies, and motor starters
BUSSMANN
Time-delay cylindrical fuse rated 500 mA at 250 V AC, non-indicating, with dimensions 1/4 in x 1 1/4 in. Suitable for protecting circuits with inrush currents in control panels, power supplies, and motor starters
BUSSMANN FNM-2 is a 2 A, 250 V AC time-delay cylindrical fuse in the Midget size (13/32 in x 1 1/2 in). It is non-indicating and designed to protect circuits with inductive loads, such as motors and transformers, by tolerating temporary inrush currents without nuisance opening
BUSSMANN
BUSSMANN FNM-2 is a 2 A, 250 V AC time-delay cylindrical fuse in the Midget size (13/32 in x 1 1/2 in). It is non-indicating and designed to protect circuits with inductive loads, such as motors and transformers, by tolerating temporary inrush currents without nuisance opening
Midget time-delay cylindrical fuse rated 1.4 A and 250 V AC. Non-indicating design with dimensions 13/32 in x 1 1/2 in. Provides overcurrent protection in branch circuits for motors, transformers, and other inductive loads where temporary inrush currents occur
BUSSMANN
Midget time-delay cylindrical fuse rated 1.4 A and 250 V AC. Non-indicating design with dimensions 13/32 in x 1 1/2 in. Provides overcurrent protection in branch circuits for motors, transformers, and other inductive loads where temporary inrush currents occur
The BUSSMANN FRS-R-6 is a Class RK5 time-delay cylindrical fuse rated 6 A, 600 V AC, and 300 V DC. It is non-indicating and part of the FRS-R series. This fuse is used for overcurrent protection of motor circuits, transformers, and other inductive loads, allowing harmless inrush currents to pass without nuisance opening
BUSSMANN
The BUSSMANN FRS-R-6 is a Class RK5 time-delay cylindrical fuse rated 6 A, 600 V AC, and 300 V DC. It is non-indicating and part of the FRS-R series. This fuse is used for overcurrent protection of motor circuits, transformers, and other inductive loads, allowing harmless inrush currents to pass without nuisance opening
Midget time-delay fuse rated 20 A, 250 V AC, with non-indicating design. Dimensions: 13/32 in x 1 1/2 in. Suitable for protecting circuits with temporary inrush currents, such as in control panels and motor circuits
BUSSMANN
Midget time-delay fuse rated 20 A, 250 V AC, with non-indicating design. Dimensions: 13/32 in x 1 1/2 in. Suitable for protecting circuits with temporary inrush currents, such as in control panels and motor circuits
The BUSSMANN GMC-8-R is a 5 mm x 20 mm time-delay cylindrical fuse rated for 8 A at 125 V AC. It is part of the GMC Series and provides overcurrent protection in circuits where inrush currents occur, such as those with motors, transformers, or power supplies
BUSSMANN
The BUSSMANN GMC-8-R is a 5 mm x 20 mm time-delay cylindrical fuse rated for 8 A at 125 V AC. It is part of the GMC Series and provides overcurrent protection in circuits where inrush currents occur, such as those with motors, transformers, or power supplies
Class RK5 time-delay cylindrical fuse rated 100 mA, 600 V AC, 300 V DC. Non-indicating design from the FRS-R series. Provides overcurrent protection for motor circuits, transformers, and other inductive loads, tolerating harmless inrush currents in industrial control panels and HVAC equipment
BUSSMANN
Class RK5 time-delay cylindrical fuse rated 100 mA, 600 V AC, 300 V DC. Non-indicating design from the FRS-R series. Provides overcurrent protection for motor circuits, transformers, and other inductive loads, tolerating harmless inrush currents in industrial control panels and HVAC equipment